Apparatus and method for spectral narrowing of high power diode

Details Apparatus and method for spectral narrowing of high power diode Apparatus and method for spectral narrowing of high power diode

1997-03-10

1998-08-11

Davie, James W.

Coherent light generators

Particular beam control device

Optical output stabilization

372 99, 372101, 372106, H01S 310

Patent

active

057937842

ABSTRACT:
An apparatus for spectral narrowing of high power diode laser arrays includes a high power diode laser array configured for production of an output light beam, a collimator configured for collimation of the output light beam, and a half-wave plate and polarizing beamsplitter positioned to receive the output light beam and to separate it into a feedback beam and a usable beam. The apparatus further includes an interference filter positioned to receive the feedback beam and form it into a filtered feedback beam. The filter has a narrow passband about a desired wavelength. The apparatus still further includes a cat's eye reflector to receive the feedback beam, direct it through the interference filter, and couple the filtered feedback beam into the diode laser array. A method for spectral narrowing of high-power diode laser arrays includes the steps of collimating the light output from the high power diode laser array; passing it through a beamsplitter to obtain feedback and usable beams; passing the feedback beam through an interference filter to form a filtered feedback beam; and coupling the filtered feedback beam back into the diode laser array.

REFERENCES:
patent: 5386426 (1995-01-01), Stephens
patent: 5555253 (1996-09-01), Dixon
patent: 5706301 (1998-01-01), Lagerstrom
Stephens, et al., "Diode-Pumped Upconversion Laser with 100-mW Output Power," Optics Letters, vol. 18, No. 1, pp. 34-36, (Jan. 1993).

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